Hi,
We have tried your sequence on one of our platforms using the latest R5-SP3 drivers and had no issues.
It might have been an issue with an older driver/firmware version. Are you using the nlcp package that is build into your Linux kernel?
Can you update your nlcp package?
See the log below:
root@am335x-evm:~# calibrator wlan0 plt power_mode on
[ 103.568450] wl12xx: power up
[ 104.033813] wl12xx: firmware booted in PLT mode (PLT 6.3.10.0.130)
root@am335x-evm:~# calibrator wlan0 plt tune_channel 0 13
calibrator wlan0 plt tx_cont 200000 2 2048 0 2000 0 3 0 0 0 0 0 1 0 18:87:96:50:A1:9B
root@am335x-evm:~# calibrator wlan0 plt tx_stop
Best Regards,
Eyal Reizer